Trichrysis cyanea

Trichrysis cyanea is a species of cuckoo wasps, insects in the family Chrysididae.

Trichrysis cyanea
Trichrysis cyanea
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Hymenoptera
Suborder:
Apocrita
Superfamily:
Chrysidoidea
Family:
Chrysididae
Subfamily:
Chrysidinae
Genus:
Trichrysis
Species:
T. cyanea
Binomial name
Trichrysis cyanea
(Linnaeus, 1758)
Synonyms
  • Sphex cyanea Linnaeus, 1758

Distribution

This species is widespread in most of Europe and northern Africa throughout the Palearctic realm (central Asia, Siberia, Korea, China, and Japan).[1][2][3]

Habitat

These wasps inhabit forest margins, clearings and areas with sun-exposed dead trees and tree stumps, usually nesting sites of its hosts.[3]

Description

Trichrysis cyanea can reach a body length of about 4–8 mm (0.16–0.31 in). These small sized cuckoo wasps have an elongated and completely blue-green or violet colored body, but males are often completely or partly black.[3] The posterior margin of the third tergite of the abdomen shows three small wide teeth. The first tergite has a smooth middle furrow.[3]

This species is very similar to the species of the genus Chrysis.

Biology

The adults can be found in several generations from May to October, but mainly during June and July.[3] These wasps parasitizes mainly on wasps of the group Trypoxylon figulus and Trypoxylon attenuatum (Crabronidae), but also Auplopus carbonarius and species of Dipogon (Pompilidae). Other recorded hosts are Hylaeus pectoralis, Heriades truncorum, Pemphredon lethifera, Stigmus pendulus, Ancistrocerus, Odynerus parietum, Cemonus unicolor, Nitela spinolae, Ectemnius rubicolus, Pison atrum, Psenulus pallipesi, Osmia aenea, Osmia giraudi and Chelostoma florisomne.[2][3][4]

The female lays her egg at different times of nest building. The larvae are well recognizable by its gray-green body and brightly colored head and abdomen. Over the next five days, the larvae feed on the food supply. The pupation takes place in a shining golden brown cocoon. The development of the imago lasts 17 to 23 days. Larvae usually overwinter.[5]

References
  1. Fauna Europaea
  2. Agnoli G.L. & Rosa P., 2019 Chrysis.net Database of the Italian Chrysididae Interim version 1 September 2019
  3. Artsdatabanken
  4. BWARS, Bees, Wasps & Ants Recording Society
  5. Rolf Witt: Wespen. Beobachten, Bestimmen. Naturbuch-Verlag, Augsburg 1998, ISBN 3-89440-243-1(in German)


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